#1. - If you did anything minimally controversial, use your trump card.
BR trump cards: Say that they were were racist with you.
NA and EU trump cards: Say that they are sending death threads to you.
#2. Don't do nothing about it.
After all, why do I have to proof something, right?
#3. Let your sick fanbase do the dirty job for you.
You said that they attacked you and now you're the victim, so the fanbase are angry with, guess who? The enemy team players!
#4. Use the reverse card.
Reverse card: The enemy team will start to get hated and now they are back in step #1.